Is CVE-2023-1945 in the CISA KEV catalog?

No. CVE-2023-1945 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-1945?

CVE-2023-1945 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2023-1945?

CVE-2023-1945 has an EPSS score of 0.64% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-1945?

Upgrade firefox-esr on debian 11 to 102.10.0esr-1~deb11u1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2023-1945

MEDIUM

6.5

CVSS v3

NVD

Description

Unexpected data returned from the Safe Browsing API could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 102.10 and Firefox ESR < 102.10.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

firefox-esrDebian

Fixed in:102.10.0esr-1~deb11u1CVE-2023-1945

Fixed in:102.10.0esr-1CVE-2023-1945

thunderbirdUbuntu

Fixed in:1:102.10.0+build2-0ubuntu0.18.04.1USN-6015-1

Fixed in:1:102.10.0+build2-0ubuntu0.20.04.1USN-6015-1

Fixed in:1:102.10.0+build2-0ubuntu0.22.04.1USN-6015-1

Fixed in:1:102.10.0+build2-0ubuntu0.22.10.1USN-6015-1

Mozilla Firefox ESR (en-US)Windows application

Affected:102.10Fixed in:102.10Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:102.10Fixed in:102.10Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

0.64%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Vendor Advisory3

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-01-09.